This will document the construction of a Helios (see photos of completed Helios at http://www.solarfire.org/Helios,36 ) in Lytton Springs, Texas (just a bit less than 30 degrees N. Latitude). Since the first construction article for the Helios was written in French, I ran the article through a translation program, saved it, and printed it so I could convert the measurements for materials into American units of thicknesses, widths, and lengths that I could purchase at a local steel supply yard. (Discount Door and Metal L.L.C 2 at 1083 Highway 71 West, in Bastrop, Texas 78602) Then, I obtained a printed price list from them, and made a list of what I wanted, and hooked up my 12 foot long cattle trailer to my diesel truck and drove the 20 miles to the supply yard. Loading the 24 feet long 11 gauge (heavy duty) square tubing into the 12 foot trailer left me with a good bit angled up into the air over the bed of the truck. With luck, I managed to clear all the low hanging power and telephone lines on the way home. The first photo shows the material and prices I picked up on that trip. Then using the pictorial Helios construction plans put together by Marie Testud (GUIDE DE CONSTRUCTION FOUR HELIOS) I began using a hacksaw and a 14" metal chop saw to cut metal. To cut the 3" wide 1/8" thick material that the 12" mirror tiles are glued to, I used the chop saw to cut two at once. Put them on edge, measure carefully (These need to be square 3" by 3") and lower the grinding disk. Works great! Then clean up the edges on the bench grinder. The smaller pieces for the spider were cut in a bench vise using some old hacksaws, mostly to save on material, because the chop saw takes at least 1/8" of material for each cut. However, the chop saw does cut at pretty close to 90 degrees each time.